package com.atguigu.lease.web.admin.custom.converter;

import com.atguigu.lease.model.enums.BaseEnum;
import org.springframework.core.convert.converter.Converter;
import org.springframework.core.convert.converter.ConverterFactory;
import org.springframework.stereotype.Component;

import java.util.Arrays;
@Component
public class StringToBaseEnumConverterFactory implements ConverterFactory<String, BaseEnum> {

    @Override
    public <T extends BaseEnum> Converter<String, T> getConverter(Class<T> targetType) {
        return new Converter<String, T>() {

            // 获取枚举中的所有可选值有两种情况
            //1,具体的枚举类型 ItemType-> ItemType.value()
            //2.已知的class  class 中提供了一个方法：getEnumConstants()
            @Override
            public T convert(String source) {
                return  Arrays.stream(targetType.getEnumConstants()).filter(t -> source.equals(t.getCode()+""))
                        .findFirst().orElseThrow(RuntimeException::new);

            }
        };
    }
}
